文献类型： 外文期刊

作者： Zhang, Weiqiang ¹ ; Fan, Yanli ¹ ; Zhang, Sha ¹ ; Lu, Baishan ⁵ ; Duan, Liusheng ¹ ; Li, Zhaohu ¹ ; Tan, Weiming ¹ ;

作者机构： 1.China Agr Univ, Minist Educ, Engn Res Ctr Plant Growth Regulator, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China

2.China Agr Univ, Coll Agron & Biotechnol, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China

3.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, CIMMYT China Specialty Maize Res Ctr, 1000 Jin Qi Rd, Shanghai 201403, Peoples R China

4.Chinese Acad Agr Sci, Key Lab Crop Water Use & Regulat, Minist Agr, Farmland Irrigat Res Inst, 380 Hongli Rd, Beijing 100097, Henan, Peoples R China

5.Beijing Acad Agr & Forestry Sci, 9 Shuguang Garden Middle Rd, Beijing 100097, Peoples R China

关键词： Lodging percentage; Plant and ear height; Residue ratio; Waxy maize; Yield components; Plant growth regulator

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2019 年 22 卷 2 期

页码：

收录情况： SCI

摘要： High crop density often weakens plants, thereby leading to an increased risk of lodging and reductions in crop yield. In this study, the effects of a novel plant growth regulator, DHEAP [N, N-diethyl-2-hexanoyl oxygen radicals-ethyl amine (2-ethyl chloride) phosphoric acid salt], on waxy maize yield and lodging was evaluated. The field experiment was conducted at two locations (Changping and Wuqiao, China), four plant densities (4.5, 6.0, 7.5 and 9.0 plants m(-2)) and three cultivars (JHN 2008, JKN 2000 and JKN 928) in 2015. After foliar spraying with DHEAP during the 8-leaf stage, fresh ear and grain yield, yield components, and lodging percentage were determined for all cultivars. Grain yield showed a significant increase (3.47%), thousand-kernel weight and kernel number per ear increased by 6.10 and 3.21%, respectively after DHEAP treatment. The optimal plant density ranged from 6.0 to 7.5 plants m(-2). DHEAP significantly decreased waxy maize lodging percentage for all cultivars. Among the maize cultivars, the yield of the compact short plant cultivar JKN 928 was higher than that of JKN 2000 and JHN 2008. It is concluded that optimized plant density might enhance waxy maize yield with a single application of DHEAP before jointing stage. (C) 2019 Friends Science Publishers